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15+0.90m=2(20+.25m)
We move all terms to the left:
15+0.90m-(2(20+.25m))=0
We add all the numbers together, and all the variables
0.90m-(2(.25m+20))+15=0
We calculate terms in parentheses: -(2(.25m+20)), so:We get rid of parentheses
2(.25m+20)
We multiply parentheses
2m+40
Back to the equation:
-(2m+40)
0.90m-2m-40+15=0
We add all the numbers together, and all the variables
-1.1m-25=0
We move all terms containing m to the left, all other terms to the right
-1.1m=25
m=25/-1.1
m=-22+0.8/1.1
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